Disk harrow



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H. s. DICKINSO DISK HARR File 27 fl Harry 6. pmhsm A. 5. mm

H. S. DICKINS DISK HARROw Filed Oct. 27'

3 Sheets-sh 5 JEUenZQJr f-farr'y Son Patented ug. 5, 1924 LMJS ; .F iOE;

ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO MOLINE PLOW COMPANY, INCORPORATED, OF MOLINE, ILLINOIS, A OORPORA TION or VIRGINIA.

DISK HARROW.

Application filed October 27, 1920. Serial No. 419,840..

To all whomc't may concern Be it known that I, HARRY S. DICKINSON, a citizen of the United States, residing at Moline, county of Rock Island, State of Illinois, have invented certain new and useful Improvements in Disk Harrows, of which the following is a. specification.

The invention relates to disk harrows. It relates particularly to the manner of mounting the disk gangs so that they may be angled to and from working position, and at the same time maintained in proper spaced relation.

It is desirable in a disk harrow to have the inner ends of the gangs as closely together as possible so as not to leave a wide strip of unharrowed soil. When out-throwing gangs are used, the tendency is for the inner ends of the gangs to approach each other, and, when in-throwing gangs are used, the tendency is for the gangs to separate. Various constructions have been proposed for taking up the end thrust and maintaining the gangs in proper spaced relation. One method is to employ bumpers or other thrust absorbing devices on the inner ends of the gangs. These bumpers are objectionable, however, for the reason that they wear very rapidly, accumulate dirt and trash, create considerable frictional resistance and they have a tendency to ride over one another, especially onuneven ground. It has also been proposed to absorb the end thrust directly upon the frame upon which the disk gangs are mounted. A rigid frame will absorb the thrust but when the gangs are properly spaced at one angle, they will not be properly spaced when the gangs are moved to another angle. The present invention has been devised to overcome these d ifliculties and to provide a structure. which will absorb the end thrust and at the same time insure that the ends of the gangs are properly spaced.

The general obj'ect of the invention is to provide an improved disk harrow.

A more specific object is toprovide an 1mproved disk harrow construction in which the end thrust of the gangs is absorbed and at the same time, the gangs are properly spaced in all their positions.

Other objects and advantages of the invention will appear from the specification and drawings.

An embodiment of the invention is shown inthe accompanying drawings in which, 7

Figure l is a plan View of the improved harrow.

Figure 2 is a side elevation of the same.

Figure 3 is a plan view of the harrow,

with the diskv position. Figure 4 is a section on the line 44 of Figure 3. t

Figure 5 is a section on the line 55 of Figure 3.

gangs in angled or working Figure 6 is a section 011 the line 66 of Figure 3.

Figure 7 is Figure 3.

A tandem or double cut disk harrow has been illustrated comprising a front pair of out-throwing gangs followed by a rear pair of in-throwing gangs. Each pair of gangs and its associated mechanisms will be described separately.

The gangs 1 and 2 of the front pair are provided with a draft frame 3 and connected to it by means of links 4 which are pivoted to the frame at the point 5 and to the gangs at the point 6. The gangs are thus free to swing about two pivots. When they swing about the pivot 6, they simply change their angle relative to the line of draft but when they swing about the pivots 5 they move bodily relative to the line of draft.

Each gang is provided with a U-shaped a section on the line 7-7 of member 7, the arms of which are attached.

to bearings on the gang shaft as shown in dotted linesin Figure 1. The base of the U-shaped member bears against a roller or anti-friction bearing carried by the frame and the base is curved so that when the gang is moved about the pivot 6, the base will always be in contact with the roller but will never interfere with the angling movement of the gangs. This permits the draft to be communicated from the frame to the U-shaped member and from that member to the gang axle. Each U-shaped member is connected by a link 9 to one arm of a bell crank lever 10, the other arm of which is connected by link 11 to a pin 12 carried by a Ushaped member 13 slidable on the draft tongue 14:. The inner ends of each of the gangs are also connected to this pin by means of links 15.

It will be evident that when the sliding member 13 is moved backwardly from the position shown in Figure 1 that two things will take place; first, the inner ends of the gangs will be moved backward and second, the bell cranks 10 will be rotated about their pivots so as to pull on the links 9. This pull will move the U-shaped members inwardly or toward the line of draft, carrying with them the disk gangs. which will swing on pivots 5. The bell crank levers and the links are proportioned so that the endwise movement of the gangs will be just sufiicient to maintain the gangs inthe proper spaced relation throughout the various angular adjustments. The reverse movement of the parts will take place when the sliding member is moved forward from the ,position shown in Figure 3.

Various mechanisms may be provided for sliding the member 13 backwardly and forwardly to angle the gangs. In the construction shown, there is provided an ad justing lever 20 pivoted at 21 to a bracket on the draft pole 14. An adjusting rack 22 is pivoted to this lever and provided with notches 23 arranged to cooperate with the pin 12. A detachable handle 24: is provided for the adjusting lever. The handle extension has a slot 25 in its lower end for cooperation with a pin 26 on the lever 20, and

, a pin 27 for cooperation with a notch in the end of lever 20. The mechanism for sliding the member 13 is operated by lifting the adjusting rack 22 by hand so as to cause one of its notches to engage the pin 12 after which the lever 20 is moved to. shift the gangs to the desired position. The draft pole isprovided with a series of holes 28 with which cooperates a pin 29 by means of which the sliding member 13 may be fixed in any of its positions.

. The gangs 30 and 31 of the rear pair are also provided with a draft frame 33 to which they areconnected by links 34: in the same manner as the gangs of the front pair are connected to their draft frame. Each of the gangs is also provided with a U-shaped member 35 and these U-shaped members are connected by links 36 with bell crank levers 37 which in turn are connected bv links 38 with members 39 slidable on arms 40 of the rear draft frame. This construction is shown in detail in Figure l. The sliding members 39 are also connected by links 41 with the inner ends of the gangs and are provided with holes a2 which may be made to coincide with holes 413 in the members 40 of the draft frame. A pin 44 is provided which may be inserted in the holes to hold the sliding member in any of a number of positions. The sliding member is adjusted to its various positions by means of the lever extension 2i used with the front pair of gangs. The bifurcated end 25 of this extension is arranged to fit over a pin 15 carried by the sliding member 39 and the pin 27 on the lever will lit in any one of a number of notches 4:6 in the bar 17 carried by the draft frame. In this manner, the sameflever which is utilized as an extension of the adjusting lever 20 of the front pair of gangs may be used for shifting the position of the rear gangs.

The operation of the rear pair of gangs is in general the same as that of the front pair, that is, when the angular position of the gangs is changed, the gangs are moved bodily so as to maintain their inner ends in the proper spaced relation. The bell crank levers 37 are mounted differently than those in the front pair of gangs because, when the rear pair of gangs is moved to angular or working position, the inner ends are moved forwardly instead of rearwardly as is the case with the front pair.

When the sliding members 39 are moved forward from the position shown in Figure 1, the inner ends of the rear pair of gangs are moved forwardly and simultaneously there is. an inward pull on the links 36 which tends to pull the gangs bodily inward.

to maintain the proper spaced relation.

This construction provides a disk ha'red to the frame and at the same time a construction is provided which will insure that the inner. ends of the, gangs are maintained in proper spaced relation in all the positions to which the gangs are usually adjusted in working and transporting the harrow.

It will be understood that the construction shown is for purposes of illustration and that variations and changes may be made therein without departing from the scope of the invention as defined by the claims. I I I claim: i 1. A disk harrow having a frame, disk gangs connected to the frame by means of links, pivoted to the frame and to the respective gangs so that the gangs may swing on their pivot with the links, or the links may swing on their pivot with the frame when the gangs are moved bodily, a U- shaped member carried by each gang, the base of the U being arcuate and being movable along a bearing surface on the frame, links connected to the inner ends of the gangs, linkage mechanism connected directly with said U-shaped member, and means for operating said'links and linkage mechanism in unison to angle the gangs and move them bodily at the same time.

2. A disk harrow having a frame, disk gangs, links pivoted to the frame and to the disk gangs toward the outer ends thereof, and linkage mechanism connected to the gangs near their inner ends for angling them, said mechanism having portions connected near the outer ends of the gangs for swinging the link connections to move the gangs bodily while they are being angled to thereby maintain the inner ends of the gangs substantially the same distance apart in all angular positions.

3. A disk harrow having a frame, disk gangs, links pivoted to the frame and to the gangs near the outer ends of the gangs, linkage mechanism connected to the gangs near their inner ends for angling them, and means connected with the linkage mechanism and with, the outer ends of the gangs for swinging the gangs and the links connecting them to the. frame on the pivot of the links with the frame.

4. A disk harrow having a frame, disk gangs, each ivoted to the frame by means of a link, means connected to the gangs toward their inner ends for angling them,

a U-shaped member connected to each gang toward its outer end, said U-shaped members having an arcuate portion bearing on the frame, and mechanism connecting the angling means to said U-shaped members for swinging the link connections so as to move the gangs bodily while they are being angled to therebymaintain the inner ends of the gangs substantially the same distance apart in all their angled positions.

5. A disk harrow having a frame, disk gangs, each pivoted to the frame by means of a link, a bearing upon the frame, a U- shaped member rigidly fixed to each of the gangs and having its base cooperating with the bearing, and linkage mechanism connected directly to the U-shaped member and to the inner ends of the gangs for angling the gangs and swinging the link connections so as to move the gangs bodily as they are an led.

n testimony whereof, I aflix my signature. HARRY S. DICKINSON. 

